20672715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:192

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19140405

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 59, 71, 105, 141, 177, 213, 235, 295, 329, 355, 413, 497, 705, 885, 987, 1065, 1239, 1491, 1645, 2065, 2485, 2773, 3337, 4189, 4935, 6195, 7455, 8319, 10011, 12567, 13865, 16685, 19411, 20945, 23359, 29323, 41595, 50055, 58233, 62835, 70077, 87969, 97055, 116795, 146615, 196883, 291165, 350385, 439845, 590649, 984415, 1378181, 2953245, 4134543, 6890905, 20672715]

約数ペア:

[(1, 20672715), (3, 6890905), (5, 4134543), (7, 2953245), (15, 1378181), (21, 984415), (35, 590649), (47, 439845), (59, 350385), (71, 291165), (105, 196883), (141, 146615), (177, 116795), (213, 97055), (235, 87969), (295, 70077), (329, 62835), (355, 58233), (413, 50055), (497, 41595), (705, 29323), (885, 23359), (987, 20945), (1065, 19411), (1239, 16685), (1491, 13865), (1645, 12567), (2065, 10011), (2485, 8319), (2773, 7455), (3337, 6195), (4189, 4935)]